From f506019e8b6500357530f1c83176525fcec6e061 Mon Sep 17 00:00:00 2001
From: David Aurelio <davidaurelio@fb.com>
Date: Tue, 29 Jan 2019 10:30:14 -0800
Subject: [PATCH] count cache hits

Summary:
@public

Adds cache hit counts to layout stats.

Reviewed By: SidharthGuglani

Differential Revision: D13844022

fbshipit-source-id: 906b4ec5fe3314287911cee2c37d77c4aac76455
---
 ReactCommon/yoga/yoga/YGMarker.h | 2 ++
 ReactCommon/yoga/yoga/Yoga.cpp   | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/ReactCommon/yoga/yoga/YGMarker.h b/ReactCommon/yoga/yoga/YGMarker.h
index 15280927282..60de5120a99 100644
--- a/ReactCommon/yoga/yoga/YGMarker.h
+++ b/ReactCommon/yoga/yoga/YGMarker.h
@@ -20,6 +20,8 @@ typedef YG_ENUM_BEGIN(YGMarker){
 typedef struct {
   int layouts;
   int measures;
+  int cachedLayouts;
+  int cachedMeasures;
 } YGMarkerLayoutData;
 
 typedef union {
diff --git a/ReactCommon/yoga/yoga/Yoga.cpp b/ReactCommon/yoga/yoga/Yoga.cpp
index 9461bb3faba..9ae16401e06 100644
--- a/ReactCommon/yoga/yoga/Yoga.cpp
+++ b/ReactCommon/yoga/yoga/Yoga.cpp
@@ -3803,6 +3803,9 @@ bool YGLayoutNodeInternal(
     layout->measuredDimensions[YGDimensionHeight] =
         cachedResults->computedHeight;
 
+    (performLayout ? layoutMarkerData.cachedLayouts
+                   : layoutMarkerData.cachedMeasures) += 1;
+
     if (gPrintChanges && gPrintSkips) {
       YGLog(
           node,